Revert Humanity back until the time they did not exist, and keep it that way.

Quoting: Anonymous Coward 19004483

"The Lord was sorry that He had made man on the earth, and He was grieved in His heart. The Lord said, "I will blot out man whom I have created from the face of the land, from man to animals to creeping things and to birds of the sky; for I am sorry that I have made them" (Gen. 6:6-7)."